Rubellite tourmaline pendant
Rough pinkish-red Rubellite
Tourmaline
Rubellite Tourmaline in Lepidolite Mica
Watermelon tourmaline
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Tourmaline crystals in quartzite
Tourmaline crystal specimen
Tourmaline crystal specimens
Elbaite mineral (tourmaline)
Black tourmaline in mica schist
Tourmaline embedded in feldspar rock
Graphic tourmaline, light micrograph
Pink tourmaline crystals growing on mica
Tourmaline gemstone
Hawk's Eye quartz stone
Elbaite mineral
Dravite mineral
Elbaite on albite and quartz
Schorl and quartz crystals in groundmass
Tourmaline crystal
Tourmaline quartz
Tourmaline Pegmatite
Tourmaline schorl specimen
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystal, thin section
Tourmaline in quartz
Tourmaline in gneiss rock
Rubellite I
Rubellite II
'Black' opal cabochon specimen
Verdite green tourmaline gemstone
Tourmaline on quartz
Granite specimen
Tourmaline cross section
Bi-coloured tourmaline crystals
Tourmaline unworked stones
Tourmaline specimen
Rubellite
Tourmaline in pegmatite host rock
Opal gem necklace
Fire opal
Opalised fossil
Ironstone matrix with potch opal
Mineral samples
Opal
Cut Watermelon Tourmaline gemstone
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Cut green Paraiba Tourmaline gemstone
Tourmaline gem
Tourmaline crystals
Tourmaline gemstones
Tourmaline pegmatite
Black tourmaline, SEM
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Tourmaline mineral, light micrograph
Tourmaline mica in slate
Blue tourmaline crystals
Tourmaline Crystals, Minas Gerais, Brazil
Schorl variety of Tourmaline, Namibia
Green Tourmaline in Muscovite, Maine
Quartz and green tourmaline crystals
Schorl, the black variety of Tourmaline
紅電気石
Amethyst
Amethyst crystals
Uvarovite garnet crystals
Orange sapphire gemstone
Topaz gemstone
Boulder opal formation
Opal specimen and cut stone
Schorl (black Toutmaline)
Quartz types
Crystals of green toumaline and pink lepidolite
Cut green Tourmaline gemstone
Limburgite
石板にシルクを三角に折りアクセサリーを配置
Rubellite crystals
Ruby
Diamond with garnet inclusion
Mineral properties, 18th century
Uncut diamond
Microdiamond crystal
Citrine
Cut diamond
Andradite crystals
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Nephrite crystals
Tremolite crystals
Topaz crystals
Pyrope sand
Blue sapphire stone
Blue Sapphire uncut stone
Jade stone
Amethyst geode
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Clinochlore with garnets
Ruby crystal and gems
Garnet crystals on schist
Sapphire crystal
Wollastonite with kolophonite
Pyrargyrite crystals
Topaz specimens
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Amethyst geode interior
Spessartine garnet
Crushed diamond, SEM
Grossular dodecahedral crystal
Andradite mineral
Demantoid
Emeralds
Uncut diamonds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Lapis lazuli crystals
Topaz crystal in albite and microcline
Emerald crystal, close up
Prismatic amethyst crystal
Olivine peridot crystal, close up
Heat-treated amethyst
Grossular garnet crystals on rock surface
Opal gemstones
Blue opal gemstones
Opal specimens